You will see some of their qualities are similar to those traditionally expected, however, these characters are individuals with their own story and experience. They may not fit into any rulebook box, and, as the game goes on, they may learn new and unusual skills.
It is very possible, once faced with the map and dungeon and this whole task, that one or the other of those characters decides: "No way, I ain't going there". We'll have to see. Stay tuned...